Foldable gas burner

ABSTRACT

The present invention relates to a foldable gas burner, in which a distance between a combustion part of a cooking part and a gas supply part is maximized when the gas burner is used in order to improve safety, and the cooking part and the gas supply part overlap each other when the gas burner is stored in order to minimize a volume, particularly, a length of the gas burner, thereby enabling the gas burner to be easily carried, stored, and received. Meanwhile, in consideration of a problem with safety such as prevention of a gas accident, there is a need for a safety means capable of automatically cutting off a supply of gas to the cooking part with high reliability when the supply part and the extension part overlap each other.

TECHNICAL FIELD

The present invention relates to a foldable gas burner which is used to cook food indoors and outdoors and is easy to carry, and more particularly, to a foldable gas burner which may be easily manufactured at a low cost, may be substantially folded when not used so that a volume of the gas burner is minimized, and may be easily unfolded when used. The present invention relates to a foldable gas burner, in which a distance between a combustion part of a cooking part and a gas container of a supply part is maximized to improve safety when the gas burner is used, and the supply part and the cooking part overlap each other to be in contact with each other when the gas burner is stored, such that a volume, particularly, a length of the gas burner may be minimized, thereby enabling the gas burner to be easily carried, stored, and received.

BACKGROUND ART

Korean Utility Model Registration No. 170522 (Nov. 27, 1999) or Korean Utility Model Registration No. 365763 (Oct. 22, 2004) discloses a foldable gas burner in the related art. However, the foldable gas burner has a structure that cannot reduce a volume of the gas burner at all when the gas burner is not used (when the gas burner is carried or stored). However, a distance between a cooking part for performing combustion and a supply part for supplying gas may be slightly increased only at the other side when the gas burner is used.

Korean Patent No. 1479401 (Dec. 29, 2014) discloses a configuration in which an inclined surface is provided and connected first, but this configuration is not easily manufactured during a manufacturing process, which causes an increase in manufacturing costs. In addition, a cooking part and a supply part are rather spread long in a row when a gas burner is not used, and as a result, there is structural contradiction in that it is difficult to carry or store the gas burner for outdoor activities, a distance between the cooking part and the supply part is rather decreased when the gas burner is used to cook food.

In addition, Korean Utility Model Application Laid-Open No. 17874 (Sep. 8, 1989) is published.

Korean Patent Application No. 151284 (Nov. 14, 2017) has been previously filed by the inventor of the present invention in order to solve the above-mentioned problems in the related art and provide a gas burner, in which a distance between a combustion part of a cooking part and a gas supply part is maximized when the gas burner is used in order to improve safety, and the combustion part of the cooking part and the gas supply part overlap each other when the gas burner is stored, such that a volume, particularly, a length of the gas burner may be minimized, thereby enabling the gas burner to be easily carried, stored, and received. Here, because the patent application serves as the basis on which the configuration of the present invention is defined, specific details of the patent application will be disclosed together with the configuration of the present invention in the following specific contents for carrying out the invention.

DISCLOSURE Technical Problem

Meanwhile, the gas burner of the above-mentioned patent application includes a supply part, a cooking part, and an extension part, and the supply part and the extension part may be folded by means of a body hinge part in order to minimize a volume of the gas burner when the gas burner is not used, such that the supply part, the extension part, and the cooking part may be folded and integrated into a single piece or unfolded. In consideration of a problem with safety such as certification related to gas safety, there is a need for a safety means capable of automatically cutting off a supply of gas to the cooking part with high reliability when the supply part and the extension part overlap each other.

Technical Solution

In order to solve the above-mentioned problem, a foldable gas burner according to the present invention includes: a supply part; an extension part; and a cooking part, in which the cooking part includes a combustion part and a support part, the extension part extends from the cooking part, the other end of the supply part is hingedly coupled to one end of the extension part through a body hinge part so that the supply part and the extension part are folded in parallel or unfolded at a maximum angle, in which when the gas burner is not used, one end of the supply part is adjacent to the cooking part and the support part is folded around a circumference of a body of the supply part in a mode in which the supply part and the extension part are folded side by side, in which when the gas burner is used, the support part is unfolded about the cooking part and the supply part is pivoted from the extension part and unfolded at a maximum angle, and in which a gas container connection restricting means for cutting off a supply of gas when the gas burner is not used is provided, and the supply part is provided with a stepped stand for supporting the supply part.

Advantageous Effects

According to the present invention, the gas burner may be easily manufactured at a low cost, and the gas burner may be substantially folded to minimize a volume of the gas burner when not used, and be easily unfolded when used, such that a distance between the cooking part and the gas supply part is maximized when the gas burner is used, thereby improving safety from fire. The cooking part and the gas supply part overlap each other when the gas burner is stored, such that a volume, particularly, a length of the gas burner may be minimized, thereby enabling the gas burner to be easily carried, stored, and received. In particular, regarding a problem with safety related to a gas accident, it is possible to provide, at a low cost and with high reliability, the gas container connection restricting means capable of automatically cutting off the supply of gas to the cooking part when the supply part and the extension part overlap each other.

DESCRIPTION OF DRAWINGS

FIGS. 1A, 1B and 2 are exemplified views related to the background art.

The following drawings are related to the present invention. However, in some drawings, illustration of any portion of a supply part or any portion of a cooking part is omitted (or provided transparently) for convenience of description.

FIG. 3 is an exploded perspective view.

FIG. 4 is an assembled perspective view. However, the top side of FIG. 4 illustrates a state in which a gas container is not mounted.

In FIG. 5, FIGS. 5A to 5C are operational views illustrating a process in which a supply part is horizontally rotated from an extension part, and FIG. 5D is an exemplified view illustrating an operating process shown in a cross section of any portion.

In FIG. 6, FIGS. 6A to 6C are operational views illustrating a process in which a stepped stand is vertically rotated from a cross section of one end of the supply part.

BEST MODE

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, referring to the background art related to a gas burner according to the present invention together with FIGS. 1A, 1B and 2, it can be seen that the gas burner broadly includes a supply part 100, an extension part 200, and a cooking part 300.

The supply part 100 includes a reception part 110, an adjustment part 120, and a piping part 130.

The reception part 110 has a vacant space portion 14 r in which a gas container 13 is received and fixed, and the reception part 110 has an openable/closable opening/closing portion 14 d, such that the gas container 13 may enter or exit the reception part 110. Meanwhile, the reception part 110 itself may be provided as the supply part 100.

The adjustment part 120 is provided at the other end 102 of the supply part and adjusts gas ignition and gas supply. When the gas container 13 is received in the reception part 110, the gas container 13 may be detached from the adjustment part 120.

The piping part 130 includes a pipe hinge part a2 that pivots (curves or rotates) along and together with a body hinge part a1. The body hinge part a1 serves as a rotary shaft when the supply part 100 and the extension part 200 are rotated relative to each other. A pipe passing hole, like a pipe hole, is formed along a length of the body hinge part a1. The pipe hinge part a2 may be further configured such that one end 131 of the piping part 130 is inserted into and passes through the pipe passing hole. The piping part 130 is connected to the extension part 200 from the supply part 100 through the pipe hinge part a2. When the supply part 100 and the extension part 200 are rotated relative to each other, the piping part 130 is rotated as the pipe hinge part a2 is rotated or twisted along with the relative rotations of the supply part 100 and the extension part 200. One end 131 of the piping part 130 is connected to the adjustment part 120 of the supply part 100, such that the supply of gas is adjusted. A middle body of the piping part 130 is placed along a length of the extension part 200 to supply the gas, and the other end 132 of the piping part 130 is connected to a combustion part 310 of the cooking part 300 to finally supply the gas.

In more detail, the pipe hinge part a2 has a gas nozzle a2 a vertically provided below the adjustment part 120, the pipe hinge part a2 has a connection pipe a2 b, the gas nozzle a2 a of the adjustment part 120 and one end 131 of the piping part 130 are connected to ends of the connection pipe a2 b in a fitted manner, and as a result, the pipe hinge part a2 is rotatably configured while preventing a leakage of gas.

The body hinge part a1 may include: a body coupling hole a1 a formed in the vertical direction below the other end 102 of the supply part; a body rotary shaft a1 b protruding upward from the other end 202 of the extension part 200 and inserted into the body coupling hole a1 a so as to serve as an axis for a horizontal rotation; a bearing a1 c configured to support the body rotary shaft a1 b; an angle restricting groove a1 d spaced apart from the body rotary shaft a1 b and provided to be recessed above the other end 202 of the extension part 200; and an angle restricting protrusion a1 e protruding downward from the adjustment part 120 or the bearing a1 c of the supply part 100 and fitted into and caught by the angle restricting groove a1 d in order to restrict a rotation angle in left and right directions.

The extension part 200 has approximately the same length as the supply part 100. When the foldable gas burner is folded, the supply part 100 adjoins the cooking part 300. When the foldable gas burner is unfolded, the supply part 100 may be maximally distant from the cooking part 300 by the length of the supply part 100.

The extension part 200 is disposed below a bottom surface of the supply part 100. A shape of the extension part 200 corresponds to an external shape of the supply part, such that the extension part 200 and the supply part 100 may be placed in parallel in a straight line and may overlap each other. The extension part 200 and the supply part 100 may have a single integrated external shape after the extension part 200 and the supply part 100 overlap each other, thereby improving integrity and minimizing interference.

The extension part 200 may include a concealing part c that protects the piping part 130 by preventing the piping part 130 from being exposed to the outside.

In the cooking part 300, one end 301 of the cooking part is connected to the other end 202 of the extension part. The combustion part 310 in which gas ignition and combustion are performed is provided at a center of an upper end of the cooking part 300. A plurality of support parts 320 (four support parts 320 illustrated in the drawings), which is to support a container, is provided around the combustion part 310 so as to be horizontally pivotable.

The support parts 320 according to the present invention are bent to correspond to the supply part 100 in a folded mode, such that the support parts 320 are in close contact with a body of the supply part 100. That is, vertical bodies d3 of the support parts 320 surround and overlap an external shape (an outer circumference, an external appearance) of the supply part 100 and thus are integrated with the supply part 100. Therefore, as the support parts 320 are folded toward the supply part 100 so as to be aligned and in close contact with an outer side of the supply part, such that an overall length and a width of the gas burner may be minimized, thereby improving integrity and minimizing interference. On the contrary, in an unfolded mode, bodies of the support parts 320 are spread radially with respect to the cooking part 300, thereby supporting the container.

The other end 102 of the supply part and one end 201 of the extension part are hingedly coupled by means of the body hinge part a1. That is, the supply part 100 and the extension part 200 are connected to be pivotable relative to each other with the body hinge part a1. When the body hinge part a1 is pivoted to fold or unfold the gas burner, the supply part 100 and the extension part 200 may be folded and overlap each other when the gas burner is not used (when the gas burner is carried or stored). That is, one end 101 of the supply part and the other end 202 of the extension part may be integrated. Therefore, one end 101 of the supply part and one end 301 of the cooking part 300 may meet together. That is, the supply part 100 and the cooking part 300 may be in close contact with each other or adjacent to each other.

On the contrary, the supply part 100 and the extension part 200 may be unfolded relative to each other when the gas burner is used. That is, one end 101 of the supply part and the other end 202 of the extension part may be distant from each other. Therefore, one end 101 of the supply part may be maximally distant from one end 301 of the cooking part. That is, the supply part 100 and the cooking part 300 may be unfolded and spaced apart from each other at a long distance.

One end 101 of the supply part approaches one end 301 of the cooking part/the other end 202 of the extension part, such that the supply part 100 and the extension part 200 overlap each other so as to minimize the volume, and on the contrary, the other end 102 of the supply part and one end 201 of the extension part are hingedly coupled to be pivotable by means of the body hinge part a1 such that the supply part 100 and the extension part 200 become distant from each other so as to maximize the volume.

The body hinge part a1 may be a typical hinge (a′) member that is pivoted like scissors or a hinge in directions f1 and f2 on a two-dimensional plane.

Next, the present invention will be described in detail with reference to exemplary embodiments illustrated in FIG. 3.

A gas container connection restricting means according to the present invention will be described.

The present invention adopts a configuration in which when the gas burner is not used, the supply part 100 and the extension part 200 (including the concealing part c) are folded and overlap each other so that the supply part 100 (including the reception part 110) and the cooking part 300 (including the combustion part 310 and the support part 320) are maximally adjacent to each other (in contact with each other). In this case, there is a problem in that the gas burner needs to be provided in a state in which the gas container 13 is spaced apart and separated from the adjustment part 120 in order to fundamentally cut off the supply of gas in order to meet safety requirements such as gas safety inspection standards.

However, in the configuration in which the supply part 100 has the angle restricting protrusion a1 e, like the background art, the angle restricting protrusion a1 e provided in the supply part 100 is rotated together with the supply part, such that the angle restricting protrusion a1 e cannot have any relative movement or influence on the gas container 13 mounted in the supply part 100. As a result, it is not easy to provide safety standards required by the gas safety inspection standards.

Accordingly, the present invention provides a gas container connection restricting means capable of restricting the supply of gas while functioning to restrict a pivoting (rotating or bending) angle of the supply part with respect to the extension part, like the background art.

First, the other end 102 of the supply part and one end 201 of the extension part are hingedly coupled by the body hinge part a1, the body hinge part a1 includes the body rotary shaft a1 b, and the pipe hinge part a2 passes through the body hinge part a1.

The gas container connection restricting means according to the present invention includes a connection restricting groove a1 d 0 and a connection restricting protrusion a1 e 0. In contrast to the background art, a radial arc-shaped (arch-shaped, eyebrow-shaped) groove (hole) is formed (punched) in a bottom surface below the other end 102 of the supply part at a position at which the connection restricting groove a1 d 0 is spaced apart from the body hinge part a1. In more detail, the radial shape of the connection restricting groove a1 d 0 is recessed to have an eyebrow shape and a predetermined spacing radius with the body hinge part a1 considered as a center of a circle.

Correspondingly, the connection restricting protrusion a1 e 0 protrudes vertically upward from an upper surface of one end 201 of the extension part 200 at a position spaced apart from the body rotary shaft a1 b. In this case, the spacing distance needs to be defined to be equal to a spacing distance (i.e., a radius) of the connection restricting groove a1 d 0 from the body rotary shaft a1 b.

In more detail, referring to the lower left side of FIG. 3, the connection restricting protrusion a1 e 0 is provided in the form of a bolt (or screw) and installed (fixed) such that a head portion a1 e 0 b is positioned in a closed space of the extension part 200 and a body portion a1 e 0 a protrudes and extends upward and outward while penetrating (passing through) the extension part 200 from the head portion a1 e 0 b. That is, like the connection restricting groove a1 d 0 formed to have a predetermined spacing distance (radius) with the body hinge part a1 considered as a center of a circle, the connection restricting protrusion a1 e 0 is provided at the same spacing distance from the body hinge part a1.

FIG. 4 illustrates an assembled state of FIG. 3. It can be seen that in the assembled state, a body of the connection restricting protrusion a1 e 0 is positioned and fitted into (penetratively inserted into) the connection restricting groove a1 d 0. Referring to the right lower side of FIG. 3 related to an accurate installation position for efficiently providing the function according to the present invention, the connection restricting protrusion a1 e 0 is positioned at one centerline side cel (any one side of a centerline in the left and right directions) that deviates from an extension part centerline ce (a centerline in a longitudinal direction of the extension part).

Therefore, additionally, the connection restricting protrusion a1 e 0 is positioned to be in contact with one side (ce1) end of the arc-shaped groove of the connection restricting groove a1 d 0, such that a catching operation is performed, and as a result, the pivoting is restricted in a direction opposite to the direction of the predetermined pivoting of the supply part 100. Further, a length of an arc of the connection restricting groove a1 d 0 is predetermined so that the connection restricting protrusion a1 e 0 is caught by the other side (ce2) end of the connection restricting groove a1 d 0, such that the further pivoting is restricted when the supply part 100 is unfolded at a maximum angle (at an approximately right angle) relative to the extension part 200. If the pivoting is permitted in any direction or the excessively pivoting exceeding a maximum angle is permitted, excessive force is applied to the pipe hinge part a2, which is configured together with the body hinge part a1, which causes a risk of gas leakage. Therefore, the above-mentioned configuration is provided to reduce the risk and prevent the body rotary shaft a1 b of the body hinge part a1 or the pipe hinge part a2, which is related to the pivoting, from being loosened when the gas burner is used over a long period of time.

In particular, regarding a problem with safety, the important reason why the connection restricting protrusion a1 e 0 according to the present invention is disposed at the centerline one side ce1 is to prevent a gas container nozzle of the gas container 13 from coming into contact with and being connected to the adjustment part 120 in the state in which the gas burner is folded and not used.

In the above-mentioned configuration and arrangement illustrated in FIGS. 3, 4, 5A, 5B, 5C and 5D, the connection restricting protrusion a1 e 0 is positioned at one side (ce1) end of the connection restricting groove a1 d 0 in the state in which the supply part 100 and the extension part 200 initially overlap each other in parallel. Therefore, in the caught (blocked) state, the gas container 13 cannot move any further toward the other end 102 and the adjustment part 120 of the supply part. To this end, the distance is measured and preset in advance in order to prevent the gas container nozzle of the gas container 13 from coming into contact with the adjustment part 120.

In FIG. 5B, when the supply part 100 is pivoted (r1) in any one of the left and right directions (clockwise in the drawing), the arc-shaped groove of the connection restricting groove a1 d 0 is pivoted at a predetermined angle about the body hinge part a1. In this case, the connection restricting protrusion a1 e 0 fixed to the extension part 200 is stationary at the fixed position on the extension part 200 in the state in which the connection restricting protrusion a1 e 0 is fitted into the connection restricting groove a1 d 0. As a result, the connection restricting groove a1 d 0 slides on and passes the connection restricting protrusion a1 e 0 while performing the arc motion. This means that the connection restricting protrusion a1 e 0 relatively (reversely) passes the connection restricting groove a1 d 0 while performing the arc motion.

Next, a stepwise functional operating method will be described with reference to FIGS. 5A, 5B, 5C and 5D (only the position of the adjustment part is illustrated, but the adjustment part is omitted in order to explain a state of the bottom surface in the supply part).

In an initially folded step illustrated in FIG. 5A, the gas container 13 is mounted in the supply part 100, an edge of one end of the gas container 13, that is, gas container one end edge 13 a is in contact with and caught by the body of the connection restricting protrusion a1 e 0, such that the gas container nozzle of the gas container 13 is spaced apart from the adjustment part 120 at a distance, and the supply of gas is cut off.

In an unfolded step illustrated in FIG. 5B, when the supply part 100 is pivoted relative to the extension part 200 and performs the arc motion (when the pivoting motion r1 is performed), gas container one end edge 13 a also performs the arc motion in the state in which the gas container one end edge 13 a is in contact with the body of the connection restricting protrusion a1 e 0. In this case, the gas container 13 moves rearward (d1) so as to slightly move back toward one end 101 of the supply part by an arc trajectory of the arc motion, such that the gas container one end edge 13 a is continuously kept in contact with the connection restricting protrusion a1 e 0, as illustrated in B-2 of FIG. 5B. Further, the rearward movement (d1) of the gas container allows the gas container 13 to be further spaced apart from the adjustment part 120 in order to assuredly cut off the supply of gas, thereby preventing an unexpected accident that may occur while the supply part 100 is unfolded, and thus improving safety.

In a step in which the unfolding is ended as illustrated in FIG. 5C, the gas container one end edge 13 a is separated from the connection restricting protrusion a1 e 0, such that the gas container may move forward. That is, the gas container 13 may move forward in the state in which the supply part 100 is completely unfolded from the extension part 200. Therefore, the gas container nozzle may be connected to the supply part 100, such that the gas burner may perform a normal function.

FIG. 5D is a view illustrating the gas container in a direction of a cross section thereof The cut-off (contact) and release relationship between the gas container one end edge 13 a and the connection restricting protrusion a1 e 0 will be described. When the pivoting motion (r1) of the gas supply part 100 is performed in the steps illustrated in FIGS. 5A and 5B, the connection restricting protrusion a1 e 0 and the gas container one end edge 13 a are kept in contact with each other while performing the sliding movements (s1, s2), that is, a contact maintaining states (a1 e 0-1, a1 e 0-2) are maintained, as illustrated in FIG. 5D. Further, at a point in time at which the pivoting of the gas supply part 100 is ended, the connection restricting protrusion a1 e 0 is separated and detached from the gas container one end edge 13 a (a1 e 0-3), such that the cut-off is released.

In order to allow the function illustrated in FIG. 5D to be performed well, the connection restricting protrusion a1 e 0 is preset to be disposed at one centerline side ce1 (any one side of the extension part centerline ce in the left and right directions), as illustrated in the lower right side of the FIG. 3. On the contrary, the body hinge part a1 is relatively positioned to slightly deviate from the other centerline side ce2 (the other side of the extension part centerline ce in the left and right directions) so as to be partially spaced apart from the connection restricting protrusion a1 e 0, thereby providing a rotation radius interval (radius) of the connection restricting groove a1 d 0/the gas container one end edge 13 a with respect to the connection restricting protrusion a1 e 0.

In this case, as can be seen from FIG. 5D, the position state a1 e 0-1 of the connection restricting protrusion a1 e 0 is disposed at one centerline side ce1, and the body thereof (or at least the upper end of the body thereof) is kept in contact with the gas container 13/the gas container one end edge 13 a. The arrangement of the connection restricting protrusion a1 e 0 needs to be predetermined, and a length of the body (a height at an upper end of the body) of the connection restricting protrusion a1 e 0 needs to be predetermined, such that when the supply part 100 and the extension part 200 are in parallel with each other (before the supply part 100 and the extension part 200 are unfolded), the gas container 13 may be prevented from moving forward toward the adjustment part 120, and the supply of gas may be cut off. This is because the gas container 13 has a circular cross section and the contact states a1 e 0-1 and a1 e 0-2 with the gas container 13 or the non-contact state a1 e 0-3 with the gas container 13 is provided depending on the body length of the connection restricting protrusion a1 e 0 and the arrangement position of the connection restricting protrusion a1 e 0, as illustrated in FIG. 5D.

After the supply part 100 and the extension part 200 are unfolded at a maximum angle, both the height and the position of the connection restricting protrusion a1 e 0 may be predetermined so that the state a1 e 0-3 of the connection restricting protrusion a1 e 0 is completely separated from the gas container 13/the gas container one end edge 13 a (the contact and the cut-off are released) and the gas container 13 may freely move toward the adjustment part 120. In the exemplary embodiment illustrated in the drawings, the connection restricting protrusion a1 e 0 is preset to be in the state a1 e 0-3 of being further distant from the gas container 13 than in the initial state a1 e 0-1 in order to implement the complete release of the cut-off after the supply part 100 is unfolded at a maximum angle.

The support part 320 according to the present invention will be described.

The four support parts 320 are provided and disposed radially. Each of the support parts 320 is hingedly coupled to the bottom surface of the support part 320, such that each of the support parts 320 may be folded or unfolded in the horizontal direction. The support part 320 includes a support part one end b0 hingedly coupled to the bottom surface of the cooking part 300 so as to be horizontally rotatable, a support part bottom body z1 disposed on a bottom and extending in a bar shape from the hingedly coupled point of the support part one end b0, a pair of front and rear support part vertical bodies z2 and z3 extending vertically upward in a bar shape from the support part bottom body z1 and bent corresponding to an outer circumferential shape of the supply part 100, and a support part support body z4 formed as a bar-shaped body at upper ends of the front and rear support part vertical bodies z2 and z3 and disposed approximately in parallel with the support part bottom body z1 so as to support the container.

In this case, the support part bottom body z1 is disposed and the support part one end b0 is hingedly coupled at the position spaced and most distant from the combustion part 310 of the cooking part 300, thereby being protected from heat (fire) generated in the combustion part 310.

In particular, unlike the background art, the front support part vertical body z2 is spaced apart from the heat of the combustion part 310 and is not in direct contact with the heat. Therefore, it is possible to prevent a problem or an accident in that the body becomes too hot, so the cooling time after the use of the gas burner becomes excessive, the rigidity is weakened and deteriorates due to high heat, or the heat is transferred to the cooking part 300 or the main body of the gas burner and heats the cooking part 300 or the main body of the gas burner. In addition, the pair of front and rear support part vertical bodies z2 and z3 is provided to be in parallel with each other and spaced apart from each other, such that the pair of front and rear support part vertical bodies z2 and z3 is not twisted even though a load is eccentrically applied, thereby increasing a supporting force for supporting the container.

A stepped stand g1 a according to the present invention will be described.

After the supply part 100 placed on the extension part 200 is unfolded, a height difference occurs between the bottom surface of the extension part 200 and the bottom surface of the supply part 100 with respect to the support part bottom body z1. Therefore, because one end 101 of the supply part floats in the air, there is a risk that one end 101 of the supply part is lowered (dropped) and inclined due to the weights of the gas container 13 and the supply part 100, an external load, or impact while the gas burner is used (to cook food). However, in the state in which the stepped stand is exposed to the outside at all times like the background art, the stepped stand interferes with the hand or casing while the gas burner is carried.

In order to solve the problem, a vertically rotatable stepped stand g1 a is provided at a cross section of one end 101 of the supply part. Hereinafter, reference will be made to FIGS. 3, 6A, 6B and 6C, but for convenience of description, illustration of the cooking part 300 is omitted and only the position of the cooking part 300 is illustrated in FIGS. 6A and 6B.

The stepped stand g1 a according to the present invention is provided as a body of a flat plate member having a length. A stepped stand rotary shaft g1 a 1 is hingedly coupled to the cross section of one end 101 of the supply part so that an upper end of the stepped stand body is rotated above the cross section of one end 101 of the supply part. A lower end of the stepped stand has a bottom contact surface g1 a 2 bent in an L shape so that the stepped stand is in contact with the bottom well and may support the supply part 100.

An operating process will be described. In a state illustrated in FIG. 6A in which the supply part 100 overlaps the extension part 200, the stepped stand g1 a is folded to be placed in parallel with the upper surface of the extension part 200. In a state illustrated in FIG. 6B in which the supply part 100 is pivoted (r1) and begins to be separated from the extension part 200, the stepped stand g1 a rotates in the vertical direction about the stepped stand rotary shaft g1 a 1 and begins to perform the downward movement (r5) toward the bottom. The downward movement (r5) is performed by gravity or a user's manual manipulation. In a state illustrated in FIG. 6C in which the supply part 100 is completely unfolded, a larger area of the bottom contact surface g1 a 2 is in contact with the bottom and unfolded to support the supply part 100 (particularly, one end 101 of the supply part) through the stepped stand g1 a. Meanwhile, the operation reverse to the above-mentioned operation is performed when the gas burner is folded. In this case, as illustrated in FIG. 6B, when the supply part 100 is pushed and folded in the direction reverse to the pivoting movement r1, the stepped stand g1 a is caught by a lateral surface of the extension part 200 and folded automatically like in the initial state.

Further, in this process, an elastically restorable spring device is added to the stepped stand rotary shaft g1 a 1 and may substitute for the gravity or manual manipulation. In this case, a well-known elastically restoring device may be applied. 

1. A foldable gas burner comprising: a supply part; an extension part; and a cooking part, wherein the cooking part comprises a combustion part and a support part, the extension part extends from the cooking part, the other end of the supply part is hingedly coupled to one end of the extension part through a body hinge part so that the supply part and the extension part are folded in parallel or unfolded at a maximum angle, wherein when the gas burner is not used, one end of the supply part is adjacent to the cooking part and the support part is folded around a circumference of a body of the supply part in a mode in which the supply part and the extension part are folded side by side, wherein when the gas burner is used, the support part is unfolded about the cooking part and the supply part is pivoted from the extension part and unfolded at a maximum angle, and wherein a gas container connection restricting means for cutting off a supply of gas when the gas burner is not used is provided.
 2. The foldable gas burner of claim 1, wherein the supply part comprises: a reception part configured to receive a gas container; an adjustment part provided at the other end of the supply part and configured to adjust gas ignition and the supply of gas; and a piping part connected to the adjustment part and configured to supply the gas.
 3. The foldable gas burner of claim 1, wherein the support part comprises: a plurality of support part one ends horizontally rotatably and hingedly coupled to a bottom surface of the cooking part; a plurality of support part bottom bodies extending from the support part one ends; a plurality of support part vertical bodies bent upward from the support part bottom bodies; and a plurality of support part support bodies provided in parallel with the support part bottom bodies at upper ends of the support part vertical bodies.
 4. The foldable gas burner of claim 1, wherein the gas container connection restricting means comprises: a connection restricting groove provided at a position spaced apart from the body hinge part and formed in the form of an arc-shaped groove at a bottom surface of the other end of the supply part with the body hinge part considered as a center of a circle; and a connection restricting protrusion provided at a position spaced apart from the body hinge part and protruding vertically from an upper surface of one end of the extension part, and wherein when the supply part is pivoted, the connection restricting groove performs an arc motion while sliding on the connection restricting protrusion about the body hinge part.
 5. The foldable gas burner of claim 4, wherein the connection restricting protrusion further comprises: a head portion fixed to the extension part; and a body portion protruding upward from the head portion and penetrating the extension part, and wherein the connection restricting protrusion is disposed at one side position that deviates from a centerline of the extension part.
 6. The foldable gas burner of claim 4, wherein a spacing distance from the body hinge part to the connection restricting groove or the connection restricting protrusion is equally set.
 7. The foldable gas burner of claim 5, wherein in a state in which the supply part and the extension part are folded side by side, the connection restricting protrusion is positioned at one side end of the connection restricting groove so that gas container one end edge is in contact with the body portion, wherein when the supply part is pivoted, the gas container one end edge performs the arc motion while being in contact with the body portion and is kept in contact with the connection restricting protrusion, and wherein when the supply part is deployed at a maximum angle, the gas container one end edge is detached from the connection restricting protrusion.
 8. The foldable gas burner of claim 4, wherein the body hinge part is disposed at the other side position that deviates from a centerline of the extension part.
 9. The foldable gas burner of claim 1, wherein the supply part has a stepped stand, and the stepped stand comprises: a body formed as a flat plate member; a stepped stand rotary shaft hingedly coupled to one end of the supply part; and a bottom contact surface configured to support the supply part when the stepped stand is in contact with a bottom.
 10. The foldable gas burner of claim 2, wherein the piping part comprises a pipe hinge part configured to be pivoted together with the body hinge part, and the pipe hinge part has a gas nozzle vertically configured at a lower end of the adjustment part, and a connection pipe having ends to which one end of the gas nozzle and one end of the piping part are coupled in a fitted manner. 